A vulcanization device for collecting pressure at a fixed point during tire vulcanization and tire intelligent design equipment

Abstract

The present application relates to the field of intelligent tire manufacturing, and in particular to a vulcanization device for collecting pressure at a fixed point during the vulcanization process of the tire and a tire intelligent design equipment. A vulcanization device for collecting pressure at a fixed point during the vulcanization process of the tire, the device includes a vulcanization mold, a through hole in the vulcanization mold, a pressure sensor is arranged in the through hole, and the pressure sensitive element of the pressure sensor is arranged corresponding to each part of the tire; the various parts of the tire include one or more of the following parts: ① The inflection point where the material of the crown of the finished tire changes from thin to thick and from thick to thin; ② The maximum bending point of the sidewall when the finished tire is in use; ③ The joints when the various parts of the mold are assembled. The device installs pressure sensors at different parts of the vulcanization mold, and uses the pressure sensors to reflect the pressure on the mold, thereby achieving the purpose of monitoring the force on the tire.

Description

Technical Field

[0001] The present application relates to the field of intelligent tire manufacturing, and in particular to a vulcanization device for collecting pressure at a fixed point during the tire vulcanization process and intelligent tire design equipment. Background Art

[0002] At present, whether from the perspective of national and industry strategic development or from the perspective of the tire industry's own survival and development, as a traditional labor-, capital-, and resource-intensive industry, the tire industry is in urgent need of intelligent upgrading and transformation, vigorously developing and producing high-tech, high-value-added, and high-quality tire products, improving production efficiency, increasing corporate benefits, and enhancing core competitiveness. The intelligent manufacturing model is imperative.

[0003] In the competitive landscape of the tire industry, "intelligent manufacturing" is not simply integrating a bunch of computers, robots, and manipulators, but the iterative update of core elements such as the innovation-driven R&D investment, automation, informatization, and intelligent production efficiency, environmental protection investment, as well as the layout of marketing models and after-sales service tracking. Internet information technology and the tire manufacturing industry are deeply integrated to realize the digitization and networking of production factors, the automation of production process knowledge, and the knowledge-driven production process, aiming to simplify management, improve quality, reduce costs and increase efficiency, and be green and environmentally friendly. There are cases that show that after the production line is intelligent, the production time of the entire process is shortened by nearly one-third compared with the traditional production method, the production efficiency is significantly improved, the scale of employment is greatly reduced, and the per capita output value and industrial added value are doubled.

[0004] Tire "intelligent manufacturing" includes not only intelligent tires and intelligent production, but also intelligent tire design. In the tire design process, the material distribution of each part of the finished tire is different according to the use and design requirements, but in the actual production of the tire, the vulcanization pressure of each part uses the same parameter. The performance of the finished tire rubber vulcanized under the same vulcanization pressure conditions with different material distributions will inevitably be different.

[0005] A study by Wang Peng, Su Zhengtao, Lai Liangqing et al. Effect of vulcanization pressure on peel strength of rubber / metal hot vulcanization bonding [J]. Journal of Aeronautical Materials, 2016, 1(36): 69-74. shows that vulcanization pressure has a great influence on the mechanical properties of rubber. As the vulcanization pressure changes, the tear strength of the rubber also changes. The reason for this is that as the vulcanization pressure changes, the distance between the rubber macromolecule chains and the crosslinking density also change. That is, the change in the average distance between the rubber macromolecule chains leads to changes in single and double sulfur bonds, and the polysulfide bonds change in the opposite direction, which ultimately leads to changes in the tear strength of the vulcanized rubber.

[0006] In order to ensure that the mechanical properties such as tear strength of the rubber in each part of the tire are consistent after vulcanization, the corresponding fixed-point vulcanization pressure should be formulated according to the thickness of the rubber in each part under the condition of consistent vulcanization time and temperature. To achieve the above solution, it is necessary to be able to monitor the vulcanization pressure of each part in real time; the data obtained by further detection can be processed by computer, and the relationship between the pressure data and the material, size parameters and vulcanization process parameters of each part of the tire can be established, and then the tire design results can be simulated to achieve the optimization of tire performance. At present, there is no fixed-point testing equipment on the market specifically for the pressure of each part of the tire. Summary of the invention

[0007] In order to solve the above-mentioned technical problems, the purpose of this application is to provide a vulcanization device for collecting pressure at a fixed point during the tire vulcanization process. The device installs pressure sensors at different parts of the vulcanization mold, and reflects the pressure exerted on the mold through the pressure sensors, thereby achieving the purpose of monitoring the force exerted on the tire.

[0008] In order to achieve the above objectives, this application adopts the following technical solutions:

[0009] A vulcanization device for collecting pressure at a fixed point during tire vulcanization, the device comprising a vulcanization mold, a through hole in the vulcanization mold, a pressure sensor disposed in the through hole, and a pressure sensitive element of the pressure sensor disposed corresponding to each part of the tire; the various parts of the tire include one or more of the following parts:

[0010] ① The turning point where the material of the finished tire crown changes from thin to thick and from thick to thin;

[0011] ② When the finished tire is in use, the part where the sidewall has the greatest deflection;

[0012] ③The joints where the mold components are assembled.

[0013] Preferably, the end surface of the pressure sensitive element in contact with various parts of the tire is a curved surface or a flat surface.

[0014] Preferably, the various parts of the tire include one or two or three or four of the crown portion, shoulder portion, sidewall portion and toe portion; the crown portion includes one or two or three of the tread portion, pattern top portion and pattern root portion; the sidewall portion includes one or two of the portion close to the parting surface and the portion with the largest cross-sectional width.

[0015] Preferably, the crown area includes the tread portion, the pattern top, the left pattern root and the right pattern root; a pressure sensor is arranged on the tread portion, and a pressure sensor is arranged on the pattern top, the left pattern root and the right pattern root respectively.

[0016] Preferably, the pressure sensors arranged at the pattern top, the left pattern root and the right pattern root are respectively located on three cross sections.

[0017] Preferably, the pressure sensor at the top of the pattern is arranged through the pattern module, and the end surfaces of the pressure sensors at the root of the left pattern and the root of the right pattern are located on both sides of the pattern module.

[0018] Preferably, one pressure sensor is provided at the tread portion, and two pressure sensors are provided at the shoulder portion, which are respectively located at the shoulder portions on both sides of the mold; the pressure sensors at the tread portion and the shoulder portion are located on the same cross section.

[0019] Preferably, the pressure sensor of the tread portion is displaced to one side to avoid the pattern in the middle of the tread; and the pressure sensors of the shoulder portion are displaced to both sides.

[0020] Preferably, two pressure sensors are provided near the parting surface, the maximum cross-sectional width and the toe opening, and the two pressure sensors at the same position are respectively located on both sides of the mold; and the pressure sensors near the parting surface, the maximum cross-sectional width and the toe opening are located on the same cross-section.

[0021] Furthermore, the present application also discloses a device for optimizing tire design, which includes the vulcanization device, a data transmission unit connected to the pressure sensor, a data receiving memory connected to the data transmission unit, and a processor; the processor processes the pressure data collected by the pressure sensor; and establishes a relationship between the pressure data and various parts of the tire including material, dimensional parameters and vulcanization process parameters, thereby simulating the tire design results to achieve optimal tire performance.

[0022] A system for optimizing the design of tires based on big data, characterized in that the system includes the vulcanization device, a data transmission unit connected to the pressure sensor, a data receiving memory connected to the data transmission unit, and a big data processing center; the big data processing center processes the pressure data collected by the pressure sensor; and by establishing a relationship between the pressure data and various parts of the tire including material, dimensional parameters and vulcanization process parameters, the tire design results are simulated to achieve tire performance optimization.

[0023] The testing principle of this application is as follows: the tire vulcanization process is mainly divided into a stamping stage, a positive vulcanization pressure holding stage, and a cooling and decompression stage. During the stamping stage, the pump injects pressure into the capsule of the tire cavity, and the pressure is transmitted to the tire, so that the tire rubber is closely attached to the inner surface of the mold. The shape of the outer surface of the tire embryo does not completely match the shape of the inner surface of the mold, so the tire rubber will flow during the stamping stage, and the pressure conditions of different parts are also different. During the positive vulcanization pressure holding stage, the pressure on the tire remains basically unchanged, but due to the structural characteristics of the pump itself, the pressure will change slightly, causing the tire pressure to fluctuate. During the cooling and decompression stage, since rubber itself is an elastic material, the pressure conditions of different parts of the tire are different during the decompression process. The pressure conditions of the rubber in various parts of the tire cannot be directly measured, but the pressure F on the tire and the pressure F' on the mold are the relationship between the action force and the reaction force, and the two are equal in magnitude and opposite in direction. Therefore, the pressure on the mold can be used to characterize the pressure on the tire. Therefore, the present application installs pressure sensing devices at different parts of the mold, and uses the pressure sensing devices to reflect the pressure on the mold, thereby achieving the purpose of monitoring the force on the tire. The tire embryo transfers the pressure it is subjected to to the inner surface of the mold, causing the inner surface of the mold to be compressed, and the pressure is equal to the pressure on the tire embryo. In order to avoid interference between sensors, between sensors and exhaust holes and movable blocks, all sensors need to be staggered circumferentially and avoid exhaust holes and movable blocks.

[0024] The present application adopts the above technical solution, and installs pressure sensors at different parts of the vulcanization mold, and uses the pressure sensors to reflect the pressure on the mold, thereby achieving the purpose of monitoring the force on the tire. Further, the present application can process the pressure data obtained by the test method, and establish the relationship between the pressure data and various parts of the tire, including material, size parameters and vulcanization process parameters, and then simulate the tire design results to achieve the optimization of tire performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic cross-sectional view of a finished tire.

[0026] Figure 2 This is a schematic diagram of the structure of the vulcanization device of this application.

[0027] Figure 3 for Figure 1 Enlarged view of part A in the middle.

[0028] Figure 4 for Figure 1 Enlarged view of part B in the middle. DETAILED DESCRIPTION

[0029] The specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0030] A vulcanization device for collecting pressure at a fixed point during tire vulcanization, the device comprises a vulcanization mold, a through hole in the vulcanization mold, a pressure sensor is arranged in the through hole, the pressure sensitive element of the pressure sensor is arranged corresponding to each part of the tire, and the end surface of the pressure sensitive element of the pressure sensor in contact with each part of the tire is an arc surface or a plane. Figure 1 As shown, the various parts of the tire include a crown portion 1, a shoulder portion 2, a sidewall portion 3 and a toe portion 4.

[0031] like Figure 2 As shown, the crown portion 1 includes a tread portion 11, a pattern top 12, a left pattern root 13 and a right pattern root 14; a pressure sensor is provided at the tread portion 11, and a pressure sensor is provided at the pattern top 12, the left pattern root 13 and the right pattern root 14 respectively. The pressure sensors provided at the pattern top 12, the left pattern root 13 and the right pattern root 14 are respectively located on three sections. One pressure sensor is provided at the tread portion 11, and two pressure sensors are provided at the shoulder portion 2, which are respectively located at the shoulder portions 2 on both sides of the mold; the pressure sensors at the tread portion 11 and the shoulder portion 2 are located on the same section. The pressure sensor at the tread portion 11 is displaced to one side to avoid the pattern in the middle of the tread; the pressure sensors at the shoulder portion 2 are displaced to both sides respectively. The sidewall portion 3 includes a pressure sensor near the parting surface 15, a maximum cross-sectional width portion 16, and two pressure sensors are arranged near the parting surface 15, the maximum cross-sectional width portion 16 and the toe mouth portion 4. The two pressure sensors at the same position are respectively located on both sides of the mold; and the pressure sensors near the parting surface 15, the maximum cross-sectional width portion 16 and the toe mouth portion 4 are located on the same cross-section.

[0032] The following uses a 12.00R20 all-steel radial tire as an example to collect data and analyze and calculate the bonding destructive force of each part to illustrate the effect of the present application.

[0033] Example 1

[0034] Using the test method described in this application, the 12.00R20 specification was used as an example for test analysis. The vulcanization pressure was 2.5 MPa, the vulcanization temperature was 170° C., and the vulcanization time was 50 min. Data collection and analysis were performed and the bonding destructive force of each part was calculated.

[0035] Example 2

[0036] Using the test method described in this application, the 12.00R20 specification was used as an example for test analysis. The vulcanization pressure was 2.0 MPa, the vulcanization temperature was 170° C., and the vulcanization time was 50 min. Data collection and analysis were performed and the bonding destructive force of each part was calculated.

[0037] Example 3

[0038] Using the test method described in this application, the 12.00R20 specification was used for test analysis. The vulcanization pressure was 1.5 MPa, the vulcanization temperature was 170° C., and the vulcanization time was 50 min. Data collection and analysis were performed and the bonding destructive force of each part was calculated.

[0039] Example 4

[0040] Using the test method described in this application, the 12.00R20 specification was used as an example for test analysis. The vulcanization pressure was 1.0 MPa, the vulcanization temperature was 170° C., and the vulcanization time was 50 min. Data collection and analysis were performed and the bonding destructive force of each part was calculated.

[0041]

[0042] Through comparative analysis of the above example data, it is found that under the same vulcanization temperature and time, the adhesive destructive force of the rubber material in each part of the tire in Example 1 is the largest, and the tear resistance of the rubber material is the strongest, which is consistent with the fitting equation.

[0043] The above is a description of the embodiments of the present application. Through the above description of the disclosed embodiments, professionals and technicians in this field can implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in this field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in this article, but will comply with the widest range consistent with the principles and novelties disclosed herein.

Claims

1. A vulcanization device for collecting pressure at a fixed point during tire vulcanization, characterized in that: The device comprises a vulcanization mold, a through hole in the vulcanization mold, a pressure sensor is arranged in the through hole, and the pressure sensitive element of the pressure sensor is arranged corresponding to each part of the tire; the various parts of the tire include one or more of the following parts: ① The turning point where the material of the finished tire crown changes from thin to thick and from thick to thin; ② When the finished tire is in use, the part where the sidewall has the greatest deflection; ③The joints of the mold parts when they are assembled; The various parts of the tire include one, two, three or four of the crown, shoulder, sidewall and toe portion; the end surface of the pressure sensitive element contacting the various parts of the tire is a curved surface or a flat surface.

2. A vulcanization device for collecting pressure at a fixed point during tire vulcanization according to claim 1, characterized in that: The crown portion includes one, two or three of the tread portion, the pattern top and the pattern root portion; the sidewall portion includes one or two of the portion close to the parting surface and the maximum section width portion.

3. A vulcanization device for collecting pressure at a fixed point during tire vulcanization according to claim 2, characterized in that: The crown area includes a tread portion, a pattern top, a left pattern root and a right pattern root; a pressure sensor is arranged on the tread portion, and a pressure sensor is arranged on the pattern top, the left pattern root and the right pattern root respectively.

4. A vulcanization device for collecting pressure at a fixed point during tire vulcanization according to claim 3, characterized in that: The pressure sensors arranged at the top of the pattern, the root of the left pattern and the root of the right pattern are respectively located on three cross sections.

5. A vulcanization device for collecting pressure at a fixed point during tire vulcanization according to claim 3, characterized in that: The pressure sensor at the top of the pattern is arranged through the pattern module, and the end surfaces of the pressure sensors at the root of the left pattern and the root of the right pattern are located on both sides of the pattern module.

6. A vulcanization device for collecting pressure at a fixed point during tire vulcanization according to claim 2, characterized in that: One pressure sensor is provided at the tread portion, and two pressure sensors are provided at the shoulder portion, which are respectively located at the shoulder portions on both sides of the mold; the pressure sensors at the tread portion and the shoulder portion are located on the same cross section.

7. A vulcanization device for collecting pressure at a fixed point during tire vulcanization according to claim 6, characterized in that: The pressure sensor on the tread portion is displaced to one side to avoid the pattern in the middle of the tread; the pressure sensors on the shoulders are displaced to both sides.

8. The vulcanization device for collecting pressure at a fixed point during tire vulcanization according to claim 2, characterized in that: Two pressure sensors are set near the parting surface, the maximum section width and the toe mouth, and the two pressure sensors in the same position are located on both sides of the mold; and the pressure sensors near the parting surface, the maximum section width and the toe mouth are located on the same section.

9. A device for optimizing tire design, characterized in that: The device comprises a vulcanizing device as claimed in any one of claims 1 to 8, a data transmission unit connected to the pressure sensor, a data receiving memory connected to the data transmission unit, and a processor; the processor processes the pressure data collected by the pressure sensor; By establishing the relationship between pressure data and various parts of the tire, including material, size parameters and vulcanization process parameters, the tire design results are simulated to achieve optimal tire performance.

10. A system for optimizing tire design based on big data, characterized in that: The system comprises a vulcanization device as described in any one of claims 1 to 8, a data transmission unit connected to the pressure sensor, a data receiving storage device connected to the data transmission unit, and a big data processing center; the big data processing center processes the pressure data collected by the pressure sensor; and simulates the tire design results by establishing the relationship between the pressure data and various parts of the tire including materials, size parameters and vulcanization process parameters, so as to achieve tire performance optimization.

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